Dynamic Interaction of Grid-Forming and Grid-Following Inverters with Synchronous Generators in Hybrid Power Plants
- Resource Type
- Conference
- Authors
- Sajadi, Amirhossein; Kenyon, Rick Wallace; Bossart, Matthew; Hodge, Bri-Mathias
- Source
- 2021 IEEE Kansas Power and Energy Conference (KPEC) Power and Energy Conference (KPEC), 2021 IEEE Kansas. :1-6 Apr, 2021
- Subject
- Components, Circuits, Devices and Systems
Power, Energy and Industry Applications
Wind energy generation
Analytical models
Wind
System dynamics
Power system stability
Wind power generation
Inverters
Hybrid power plant
Inverter-based resources
Power system dynamic stability
Renewable energy
Synchronous machine
- Language
As the integration of renewable energy resources such as wind and solar generation continues to grow, the use of hybrid power plants with both synchronous machines and power electronic inverters operating in parallel becomes more common. This paper studies the impact on small-signal stability for these pairs of devices, first as an isolated two-device system and then as part of a 9-bus test system. Each operational scenario was studied with both a grid-following inverter and a grid-forming inverter. In each scenario, the state variables associated with the synchronous generator's excitation system were found to be responsible for the inception of instability. These results underscore the importance of accurate modeling of excitation systems when modeling power systems with hybrid power plants.